90684725357 has 2 divisors, whose sum is σ = 90684725358. Its totient is φ = 90684725356.

The previous prime is 90684725347. The next prime is 90684725371. The reversal of 90684725357 is 75352748609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81388101796 + 9296623561 = 285286^2 + 96419^2 .

It is a cyclic number.

It is not a de Polignac number, because 90684725357 - 2⁶ = 90684725293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90684725347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45342362678 + 45342362679.

It is an arithmetic number, because the mean of its divisors is an integer number (45342362679).

Almost surely, 2^90684725357 is an apocalyptic number.

It is an amenable number.

90684725357 is a deficient number, since it is larger than the sum of its proper divisors (1).

90684725357 is an equidigital number, since it uses as much as digits as its factorization.

90684725357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 90684725357 in words is "ninety billion, six hundred eighty-four million, seven hundred twenty-five thousand, three hundred fifty-seven".